Page 143 - Mathematics Coursebook

End of unit review

End of unit review

1 For each of these shapes, write down the ratio of red squares to yellow squares.
a b

2 For each of these shapes, write down the ratio of green squares to blue squares.
Write each ratio in its simplest form.
a b

3 Write each of these ratios in its simplest form.
a 2 : 6 b 18 : 3 c 6 : 9 d 24 : 16

4 Chaska sees these ingredients for a concrete mix. Concrete mix
He says that the ratio of cement to sand is 2 : 1.
Is Chaska correct? Explain your answer. 2 sacks cement
4 sacks sand
5 Share these amounts between Tao and Chris in the ratios given.
a $15 in the ratio 1 : 2 b $25 in the ratio 4 : 1
c 45 kg in the ratio 3 : 2 d 24 litres in the ratio 5 : 3

6 A tin of sweets contains toffees and chocolates in the ratio 3 : 4.
The tin contains 35 sweets.
How many chocolates are in the tin?

7 Mia and Gianna are going to share $180 either in the ratio of the number of brothers they each have,
or in the ratio of the number of sisters they each have.
Mia has two brothers and three sisters.
Gianna has one brother and five sisters
How much more would Gianna get if they shared the money in the ratio of the number of sisters
rather than the ratio of brothers?
8 Sham buys one packet of peanuts for $1.60.
Work out the cost of:
a two packets of peanuts b seven packet of peanuts.
9 Four tins of beans weigh 1.6 kg.
Work out the weight of:
a 12 tins of beans b 10 tins of beans.
10 The total length of three fence panels is 5.4 m.
Work out the total length of ten fence panels.
11 A coach orders shirts for her netball team.
There are seven players in the team.
The total value of the order is $89.60.
She remembers at the last minute to order three extra shirts for the
reserve players.
What is the total value of the order now?

142 14 Ratio and proportion